ApplicationNo. 05/657281 filed on 02/11/1976
US Classes:358/410, Sync or phase pulse generator347/246, Feedback of light for intensity control347/247, Driving circuitry347/250, Scan synchronization (e.g., start-of-scan, end-of-scan)358/302, Photographic358/471, Picture signal generator358/489, Helical scanning pattern369/116Light intensity adjustment or maintenance
ExaminersPrimary: Britton, Howard W.
Assistant: Masinick, Michael A.
Foreign Application Priority Data1973-03-02 FR
AbstractAn image display method and apparatus in which a laser beam is modulated to vary in intensity in response to electric or electromagnetic signals received and is traversed along a photosensitive film carried on a rotating carriage by means of a stepwise driven, friction damped carriage synchronized with respect to the drum rotation, the drum being mounted on magnetic bearings for rotation about a preferably vertical axis. Optionally the modulated beam may be split and a part of the split beam used as a feedback signal controlling the modulation for compensating for the intensity of the beam emerging from the laser.